2026 ICD-10-CM Diagnosis Code E04.9Nontoxic goiter, unspecified

ICD-10-CM Codes›E00–E89›E00-E07›E04

ICD-10-CM E04.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E04.9 is a billable ICD-10-CM diagnosis code for nontoxic goiter, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 643 through 645. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Thyroid disorders.

Code Identity

ICD-10-CM Code
E04.9
Billable Status
Yes — Valid for Submission
Code Describes
Nontoxic goiter, unspecified
Short Description
Nontoxic goiter, unspecified
Same as the full description in the CMS dataset.
Parent Code
E04
Other nontoxic goiter

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE00-E07Disorders of thyroid gland
CategoryE04Other nontoxic goiter
This CodeE04.9Nontoxic goiter, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Autoimmune thyroiditis
  • Chronic thyroiditis
  • Goiter
  • Goiter due to thyroiditis
  • Goitrous Hashimoto thyroiditis
  • Hashimoto thyroiditis
  • Mass of thyroid gland
  • Nodular goiter
  • Sporadic goiter
  • Substernal goiter

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Goiter NOS
  • Nodular goiter (nontoxic) NOS

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Adenomatous
      • goiter (nontoxic)
    • Goiter(plunging) (substernal)
    • Goiter(plunging) (substernal)
      • nodular (nontoxic) (due to)
    • Goiter(plunging) (substernal)
      • nodular (nontoxic) (due to)
        • sporadic
    • Goiter(plunging) (substernal)
      • nontoxic
    • Struma
      • nodosa (simplex)
    • Substernal thyroid

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR END001
Thyroid disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Goiter

    enlargement of the thyroid gland that may increase from about 20 grams to hundreds of grams in human adults. goiter is observed in individuals with normal thyroid function (euthyroidism), thyroid deficiency (hypothyroidism), or hormone overproduction (hyperthyroidism). goiter may be congenital or acquired, sporadic or endemic (goiter, endemic).

  • Goiter, Endemic

    a form of iodine deficiency disorders characterized by an enlargement of the thyroid gland in a significantly large fraction of a population group. endemic goiter is common in mountainous and iodine-deficient areas of the world where the diet contains insufficient amount of iodine.

  • Goiter, Nodular

    an enlarged thyroid gland containing multiple nodules (thyroid nodule), usually resulting from recurrent thyroid hyperplasia and involution over many years to produce the irregular enlargement. multinodular goiters may be nontoxic or may induce thyrotoxicosis.

  • Goiter, Substernal

    an enlarged thyroid gland with at least 50% of the gland situated behind the sternum. it is an unusual presentation of an intrathoracic goiter. substernal goiters frequently cause compression on the trachea leading to deviation, narrowing, and respiratory symptoms.

  • Graves Disease

    a common form of hyperthyroidism with a diffuse hyperplastic goiter. it is an autoimmune disorder that produces antibodies against the thyroid stimulating hormone receptor. these autoantibodies activate the tsh receptor, thereby stimulating the thyroid gland and hypersecretion of thyroid hormones. these autoantibodies can also affect the eyes (graves ophthalmopathy) and the skin (graves dermopathy).

  • Lingual Goiter

    pathological enlargement of the lingual thyroid, ectopic thyroid tissue at the base of the tongue. it may cause upper airway obstruction; dysphagia; or hypothyroidism symptoms.

Patient EducationClinical

Thyroid Diseases

Your thyroid is a small, butterfly-shaped gland in the front of your neck. It makes hormones that control the way the body uses energy. These hormones affect nearly every organ in your body and control many of your body's most important functions. For example, they affect your breathing, heart rate, weight, digestion, and moods.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert E04.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
241.9 Nontox nodul goiter NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About E04.9Overview

Is E04.9 (Other nontoxic goiter) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report nontoxic goiter, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does E04.9 group to?

When nontoxic goiter, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 643, 644, 645, with relative weights from 0.7683 to 1.6461 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of E04.9?

Under the General Equivalence Mappings, nontoxic goiter, unspecified converts to ICD-9-CM 241.9 (nontox nodul goiter NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.